671 lines
27 KiB
PHP
671 lines
27 KiB
PHP
<?php
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// This file is part of the Studyplan plugin for Moodle
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <https://www.gnu.org/licenses/>.
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/**
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* Webservice related to courses
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* @package local_treestudyplan
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* @copyright 2023 P.M. Kuipers
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* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace local_treestudyplan;
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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->libdir.'/externallib.php');
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use local_treestudyplan\courseinfo;
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use local_treestudyplan\associationservice;
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use local_treestudyplan\local\helpers\webservicehelper;
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use local_treestudyplan\completionscanner;
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use local_treestudyplan\gradingscanner;
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use local_treestudyplan\debug;
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use core_course_category;
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use moodle_exception;
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/**
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* Webservice related to courses
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*/
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class courseservice extends \external_api {
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/**
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* Capability required to edit study plans
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* @var string
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*/
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const CAP_EDIT = "local/treestudyplan:editstudyplan";
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/**
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* Capability required to view studyplans (for other users)
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* @var string
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*/
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const CAP_VIEW = "local/treestudyplan:viewuserreports";
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/**
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* Get the topmost categories for the specicied user.
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* Most of the work is offloaded to an SQL query in the interest of speed, but moodle functions are used to double check access permissions.
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* @param int $userid Id of the user
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* @return array of core_course_category
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*/
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public static function user_tops($userid=null, $capability='moodle/category:viewcourselist') {
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global $DB, $USER;
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if ($userid == null) {
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$userid = $USER->id;
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}
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$tops = [];
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if (has_capability($capability, \context_system::instance(), $userid)) {
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if ($capability == 'moodle/category:viewcourselist') {
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// We are now just looking for the visible main level categories.
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// Add all categories of depth = 1;
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$rs = $DB->get_recordset("course_categories", ["depth" => 1], 'sortorder');
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foreach( $rs as $rcat) {
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// Get the category, and double check if the category is visible to the current user.
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// Just in case it is a hidden category and the user does not have the viewhidden permission.
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$cat = \core_course_category::get($rcat->id, \IGNORE_MISSING, false, $userid);
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if ($cat !== null) {
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// Register the category.
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array_push($tops, $cat);
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}
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}
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$rs->close();
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} else {
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// Context is system, but system may not be visible
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// Return the top visible categories for this user.
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// Recurses only once.
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return self::user_tops($userid);
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}
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} else {
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// We need to search for the permissions on an individial context level.
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// This part finds all top categories with a certain permission that are also visible for the user.
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$sql = "SELECT UNIQUE ctx.* FROM {context} AS ctx
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INNER JOIN {role_assignments} AS ra ON ra.contextid = ctx.id
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INNER JOIN {role_capabilities} AS rc ON ra.roleid = rc.roleid
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LEFT JOIN {course_categories} AS cat ON ctx.instanceid = cat.id
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WHERE ( ctx.contextlevel = :ctxl_coursecat )
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AND ra.userid = :userid AND rc.capability = :capability
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ORDER BY ctx.depth ASC, cat.sortorder ASC";
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// Use recordset to handle the eventuality of a really big and complex moodle setup.
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$recordset = $DB->get_records_sql($sql, ["userid" => $userid, "capability" => $capability,
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"ctxl_coursecat" => \CONTEXT_COURSECAT ]);
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$params = ["userid" => $userid, "capability" => $capability,
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"ctxl_coursecat" => \CONTEXT_COURSECAT ];
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$contextids = [];
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foreach ($recordset as $r) {
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// Get the paths as an array.
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$parents = explode("/", $r->path);
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// Strip the first item, since it is an empty one.
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array_shift($parents);
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// Strip the last item, since it refers to self.
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array_pop($parents);
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// Figure out if any of the remaining parent contexts are already contexts with permission.
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$intersect = array_intersect($contextids, $parents);
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if (count($intersect) == 0) {
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// Double check permissions according to the moodle capability system.
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$ctx = \context::instance_by_id($r->id);
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if (has_capability($capability, $ctx, $userid)) {
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// Get the category, and double check if the category is visible to the current user.
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// Just in case it is a hidden category and the user does not have the viewhidden permission.
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$cat = \core_course_category::get($r->instanceid, \IGNORE_MISSING, false, $userid);
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if ($cat !== null) {
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// Register the context id in the list now, since we know the category is really visible.
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array_push($contextids, $r->id);
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// Register the category.
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array_push($tops, $cat);
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} else {
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// The category is not visible. Add the first known visible subcategories.
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$children = self::get_first_visible_children($r->id, $userid);
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foreach ($children as $cat) {
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array_push($tops, $cat);
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}
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}
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}
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}
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}
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//$recordset->close();
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}
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return $tops;
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}
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/**
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* Find the top-most child categories for a given category that are visible.
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*
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* @param int $parentid The category to search for
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* @return array of \core_course_category
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*/
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private static function get_first_visible_children($parentid, $userid) {
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global $DB;
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$capability = 'moodle/category:viewcourselist';
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$tops = [];
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$pathlike = $DB->sql_like('ctx.path', ':pathsearch');
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$sql = "SELECT UNIQUE ctx.* FROM {context} AS ctx
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INNER JOIN {role_assignments} AS ra ON ra.contextid = ctx.id
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INNER JOIN {role_capabilities} AS rc ON ra.roleid = rc.roleid
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LEFT JOIN {course_categories} AS cat ON ctx.instanceid = cat.id
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WHERE ( ctx.contextlevel = :ctxl_coursecat )
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AND ra.userid = :userid AND rc.capability = :capability
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AND {$pathlike}
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ORDER BY ctx.depth ASC, cat.sortorder ASC";
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// Use recordset to handle the eventuality of a really big and complex moodle setup.
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$recordset = $DB->get_recordset_sql($sql, ["userid" => $userid,
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"capability" => $capability,
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"ctxl_coursecat" => \CONTEXT_COURSECAT,
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"pathsearch" => "%/{$parentid}/%",
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]);
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$contextids = [];
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foreach ($recordset as $r) {
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// Get the paths as an array.
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$parents = explode("/", $r->path);
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// Strip the first item, since it is an empty one.
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array_shift($parents);
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// Strip the last item, since it refers to self.
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array_pop($parents);
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// Figure out if any of the remaining parent contexts are already contexts with permission.
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$intersect = array_intersect($contextids, $parents);
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if (count($intersect) == 0) {
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// Double check permissions according to the moodle capability system.
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$ctx = \context::instance_by_id($r->id);
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if (has_capability($capability, $ctx, $userid)) {
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// Get the category, and double check if the category is visible to the current user.
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// Just in case it is a hidden category and the user does not have the viewhidden permission.
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$cat = \core_course_category::get($r->instanceid, \IGNORE_MISSING, false, $userid);
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if ($cat !== null) {
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// Register the context id in the list now, since we know the category is really visible.
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array_push($contextids, $r->id);
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// Register the category.
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array_push($tops, $cat);
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}
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}
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}
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}
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$recordset->close();
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return $tops;
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}
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/**
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* Return value description for map_categories function
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*/
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public static function map_categories_parameters(): \external_function_parameters {
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return new \external_function_parameters( [
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"studyplan_id" => new \external_value(PARAM_INT, 'ID of studyplan to map the categories for', VALUE_DEFAULT),
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] );
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}
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/**
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* Parameter description for map_categories function
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*/
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public static function map_categories_returns(): \external_description {
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return new \external_multiple_structure(static::map_category_structure(false));
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}
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/**
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* Structure description for category map, used in a number of return descriptions
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* @param bool $lazy
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* @param int $value
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*/
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protected static function map_category_structure($lazy = false, $value = VALUE_REQUIRED) {
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$s = [
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"id" => new \external_value(PARAM_INT, 'course category id'),
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"context_id" => new \external_value(PARAM_INT, 'course category context id'),
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"category" => contextinfo::structure(VALUE_OPTIONAL),
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"haschildren" => new \external_value(PARAM_BOOL, 'true if the category has child categories'),
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"hascourses" => new \external_value(PARAM_BOOL, 'true if the category contains courses'),
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"studyplancount" => new \external_value(PARAM_INT, 'number of linked studyplans', VALUE_OPTIONAL),
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];
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if (!$lazy > 0) {
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$s["courses"] = new \external_multiple_structure( courseinfo::editor_structure() );
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$s["children"] = new \external_multiple_structure( static::map_category_structure(true));
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}
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return new \external_single_structure($s, "CourseCat info", $value);
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}
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/**
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* Get a category map, and optionally specify a root category to search for
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* User's top category will be used if none specified
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* @param int $rootid Optional starting category for the map
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* @return array
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*/
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public static function map_categories($studyplanid = 0) {
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global $USER;
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// Determine top categories from provided context.
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if ($studyplanid == 0) {
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// On the system level, determine the user's topmost allowed catecories.
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// This uses a custom function, since moodle's "core_course_category::user_top()" is somewhat deficient.
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$children = self::user_tops();
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if (count($children) == 0) {
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throw new moodle_exception("error:nocategoriesvisible", "local_treestudyplan");
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}
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} else {
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if (\get_config("local_treestudyplan", "limitcourselist")) { // TODO: Insert config setting here
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$studyplan = studyplan::find_by_id($studyplanid);
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$context = $studyplan->context();
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if ($context->contextlevel == \CONTEXT_SYSTEM) {
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$children = self::user_tops();
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} else if ($context->contextlevel == \CONTEXT_COURSECAT) {
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$cat = \core_course_category::get($context->instanceid, \MUST_EXIST, true);
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if ($cat->is_uservisible()) {
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$children = [$cat];
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} else {
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$ci = new contextinfo($context);
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$contextname = $ci->pathstr();
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throw new moodle_exception("error:cannotviewcategory", "local_treestudyplan", '', $contextname);
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}
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} else {
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$children = [];
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}
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} else {
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$children = self::user_tops();
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if (count($children) == 0) {
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throw new moodle_exception("error:nocategoriesvisible", "local_treestudyplan");
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}
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}
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}
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$list = [];
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foreach ($children as $cat) {
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$list[] = static::map_category($cat, false);
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}
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return $list;
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}
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/**
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* Return value description for get_category function
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*/
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public static function get_category_parameters(): \external_function_parameters {
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return new \external_function_parameters( [
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"id" => new \external_value(PARAM_INT, 'id of category'),
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] );
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}
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/**
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* Parameter description for get_category function
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*/
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public static function get_category_returns(): \external_description {
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return static::map_category_structure(false);
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}
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/**
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* Get category info by id
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* @param mixed $id
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* @return array
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*/
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public static function get_category($id) {
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$cat = \core_course_category::get($id);
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return static::map_category($cat);
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}
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/**
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* Create a category map, given a specific category
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* @param core_course_category $cat The category to scan
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* @param bool $lazy If lazy loading, do not scan child categories
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* @return array
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*/
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protected static function map_category(core_course_category $cat, $lazy = false) {
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global $DB;
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$catcontext = $cat->get_context();
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$ctxinfo = new contextinfo($catcontext);
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$children = $cat->get_children(); // Only shows children visible to the current user.
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$courses = $cat->get_courses();
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$model = [
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"id" => $cat->id,
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"context_id" => $catcontext->id,
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"category" => $ctxinfo->model(),
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"haschildren" => !empty($children),
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"hascourses" => !empty($courses),
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];
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if (!$lazy) {
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$model["courses"] = [];
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foreach ($courses as $course) {
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$courseinfo = new courseinfo($course->id);
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$model["courses"][] = $courseinfo->editor_model();
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}
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$model["children"] = [];
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foreach ($children as $child) {
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$model["children"][] = static::map_category($child, true);
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}
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}
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return $model;
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}
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/**
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* List all user visible categories the current user has a given capability for.
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* @param mixed $capability
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* @param core_course_category|null $parent
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* @return array
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*/
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public static function categories_by_capability($capability) {
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global $USER;
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// List the categories in which the user has a specific capability.
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$list = [];
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$parents = self::user_tops($USER->id, $capability);
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array_merge($list, $parents);
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foreach ($parents as $parent) {
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// For optimization purposes, we include all its children now, since they will have inherited the permission.
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// #PREMATURE_OPTIMIZATION ???.
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$list = array_merge($list, self::recursive_child_categories($parent));
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}
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return $list;
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}
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/**
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* Recursively create a list of all categories unter a specified parent
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* @param core_course_category $parent
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* @return core_course_category[]
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*/
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protected static function recursive_child_categories(core_course_category $parent) {
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$list = [];
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$children = $parent->get_children();
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foreach ($children as $child) {
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$list[] = $child;
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if ($child->get_children_count() > 0) {
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$list = array_merge($list, self::recursive_child_categories($child));
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}
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}
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return $list;
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}
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/**
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* Return value description for list_available_categories function
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*/
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public static function list_available_categories_parameters(): \external_function_parameters {
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return new \external_function_parameters( [
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"operation" => new \external_value(PARAM_TEXT, 'type of operation ["view"|"edit"]', VALUE_DEFAULT),
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"refcontext_id" => new \external_value(PARAM_INT, 'id of reference context', VALUE_DEFAULT),
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]);
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}
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/**
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* Parameter description for list_available_categories function
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*/
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public static function list_available_categories_returns(): \external_description {
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return new \external_multiple_structure(static::map_category_structure(true));
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}
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/**
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* List all categories available to the current user for editing or viewing studyplans
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* @param string $operation The operation to scan usage for [edit, view]
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* @param int $refctxid Reference context id
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* @return array
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*/
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public static function list_available_categories($operation = 'edit', $refctxid = 0) {
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global $DB;
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if ($operation == "edit") {
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$capability = self::CAP_EDIT;
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} else { // Operation == "view" || default.
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$capability = self::CAP_VIEW;
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}
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// Get the context ids of all categories the user has access to view and wich have the given permission.
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$contextids = [];
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$tops = self::user_tops(null, $capability);
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foreach ($tops as $cat) {
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$ctx = \context_coursecat::instance($cat->id);
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$contextids[] = $ctx->id;
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}
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// Now get an overview of the number of study plans in a given context.
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$contextcounts = [];
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$insertctxs = [];
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$rs = $DB->get_recordset_sql("SELECT DISTINCT context_id, COUNT(*) as num FROM {local_treestudyplan}
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GROUP BY context_id");
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foreach ($rs as $r) {
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// Build the counts.
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$contextcounts[$r->context_id] = $r->num;
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// Add any of the categories containing studyplans to the list.
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$ctx = \context::instance_by_id($r->context_id);
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if (has_capability($capability, $ctx) && !in_array($r->context_id, $contextids)) {
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$insertctxs[] = $ctx;
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}
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}
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$rs->close();
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$cats = [];
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// If the reference context id is not in the list, push it there if the user has proper permissions in that context
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if ($refctxid > 1 && !in_array($refctxid, $contextids)) {
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try {
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// Get the context.
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$refctx = \context::instance_by_id($refctxid);
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// Double check permissions.
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if (has_capability($capability, $refctx)) {
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$insertctxs[] = $refctx;
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}
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} catch(\dml_missing_record_exception $x) {
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// ignore context
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}
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}
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foreach ($insertctxs as $ictx) {
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// Place this context and all relevant direct parents in the correct spots.
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$ipath = $ictx->get_parent_context_ids(true);
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$found = false;
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foreach ($ipath as $i => $pid) {
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$idx = array_search($pid, $contextids);
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if ($idx !== false) {
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$contextids = array_merge(
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array_slice($contextids, 0, $idx+1),
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array_reverse(array_slice($ipath, 0, $i)),
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array_slice($contextids, $idx+1, count($contextids) - 1)
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) ;
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$found = true;
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break;
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}
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}
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if (!$found) {
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array_unshift($contextids, $ictx->id);
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}
|
|
}
|
|
|
|
// Now translate this to the list of categories.
|
|
foreach ($contextids as $ctxid ) {
|
|
try {
|
|
$ctx = \context::instance_by_id($ctxid);
|
|
if ($ctx->contextlevel == CONTEXT_SYSTEM) {
|
|
$cat = \core_course_category::top();
|
|
} else if ($ctx->contextlevel == CONTEXT_COURSECAT) {
|
|
$cat = \core_course_category::get($ctx->instanceid, \MUST_EXIST, false);
|
|
}
|
|
$cats[] = $cat;
|
|
// In edit mode, also include direct children of the currently selected context.
|
|
if ($operation == "edit" && $ctxid == $refctxid) {
|
|
// Include direct children for navigation purposes.
|
|
foreach ($cat->get_children() as $ccat) {
|
|
$ccatctx = \context_coursecat::instance($ccat->id);
|
|
if (!in_array($ccatctx->id, $contextids)) {
|
|
$cats[] = $ccat;
|
|
}
|
|
}
|
|
}
|
|
} catch (\dml_missing_record_exception $x) {
|
|
// ignore context
|
|
}
|
|
}
|
|
|
|
// And finally build the proper models, including studyplan count in the category context.
|
|
$list = [];
|
|
foreach ($cats as $cat) {
|
|
$count = 0;
|
|
$ctxid = $cat->get_context()->id;
|
|
if (array_key_exists($ctxid, $contextcounts)) {
|
|
$count = $contextcounts[$ctxid];
|
|
}
|
|
|
|
$o = static::map_category($cat, true);
|
|
$o["studyplancount"] = $count;
|
|
$list[] = $o;
|
|
}
|
|
return $list;
|
|
|
|
}
|
|
|
|
/**************************************
|
|
*
|
|
* Progress scanners for teacherview
|
|
*
|
|
**************************************/
|
|
|
|
/**
|
|
* Return value description for scan_grade_progress function
|
|
* @return external_function_parameters
|
|
*/
|
|
public static function scan_grade_progress_parameters(): \external_function_parameters {
|
|
return new \external_function_parameters( [
|
|
"gradeitemid" => new \external_value(PARAM_INT, 'Grade item ID to scan progress for', VALUE_DEFAULT),
|
|
"studyplanid" => new \external_value(PARAM_INT, 'Study plan id to check progress in', VALUE_DEFAULT),
|
|
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Parameter description for scan_grade_progress function
|
|
*/
|
|
public static function scan_grade_progress_returns(): \external_description {
|
|
return gradingscanner::structure(VALUE_REQUIRED);
|
|
}
|
|
|
|
/**
|
|
* Scan grade item for progress statistics
|
|
* @param mixed $gradeitemid Grade item id
|
|
* @param mixed $studyplanid Id of studyitem the grade is selected in
|
|
* @return array
|
|
*/
|
|
public static function scan_grade_progress($gradeitemid, $studyplanid) {
|
|
global $DB;
|
|
// Verify access to the study plan.
|
|
$o = studyplan::find_by_id($studyplanid);
|
|
webservicehelper::require_capabilities(self::CAP_VIEW, $o->context());
|
|
|
|
// Retrieve grade item.
|
|
$gi = \grade_item::fetch(["id" => $gradeitemid]);
|
|
|
|
// Validate course is linked to studyplan.
|
|
$courseid = $gi->courseid;
|
|
if (!$o->course_linked($courseid)) {
|
|
throw new \webservice_access_exception(
|
|
"Course {$courseid} linked to grade item {$gradeitemid} is not linked to studyplan {$o->id()}"
|
|
);
|
|
}
|
|
|
|
$scanner = new gradingscanner($gi);
|
|
return $scanner->model();
|
|
}
|
|
|
|
/**
|
|
* Return value description for scan_completion_progress function
|
|
*/
|
|
public static function scan_completion_progress_parameters(): \external_function_parameters {
|
|
return new \external_function_parameters( [
|
|
"criteriaid" => new \external_value(PARAM_INT, 'CriteriaID to scan progress for', VALUE_DEFAULT),
|
|
"studyplanid" => new \external_value(PARAM_INT, 'Study plan id to check progress in', VALUE_DEFAULT),
|
|
"courseid" => new \external_value(PARAM_INT, 'Course id of criteria', VALUE_DEFAULT),
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Parameter description for scan_completion_progress function
|
|
*/
|
|
public static function scan_completion_progress_returns(): \external_description {
|
|
return completionscanner::structure(VALUE_REQUIRED);
|
|
}
|
|
|
|
/**
|
|
* Scan criterium for progress statistics
|
|
* @param mixed $criteriaid Id of criterium
|
|
* @param mixed $studyitemid Id of studyplan relevant to this criteria
|
|
* @return array
|
|
*/
|
|
public static function scan_completion_progress($criteriaid, $studyitemid) {
|
|
global $DB;
|
|
// Verify access to the study plan.
|
|
$item = studyitem::find_by_id($studyitemid);
|
|
$o = $item->studyline()->studyplan();
|
|
webservicehelper::require_capabilities(self::CAP_VIEW, $o->context());
|
|
|
|
$crit = \completion_criteria::fetch(["id" => $criteriaid]);
|
|
$scanner = new completionscanner($crit, $studyitemid);
|
|
return $scanner->model();
|
|
}
|
|
|
|
/**
|
|
* Return value description for scan_badge_progress function
|
|
*/
|
|
public static function scan_badge_progress_parameters(): \external_function_parameters {
|
|
return new \external_function_parameters( [
|
|
"badgeid" => new \external_value(PARAM_INT, 'Badge to scan progress for', VALUE_DEFAULT),
|
|
"studyplanid" => new \external_value(PARAM_INT,
|
|
'Study plan id to limit progress search to (to determine which students to scan)', VALUE_DEFAULT),
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Parameter description for scan_badge_progress function
|
|
*/
|
|
public static function scan_badge_progress_returns(): \external_description {
|
|
return new \external_single_structure([
|
|
"total" => new \external_value(PARAM_INT, 'Total number of students scanned'),
|
|
"issued" => new \external_value(PARAM_INT, 'Number of issued badges'),
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Scan badge for completion progress statistica
|
|
* @param mixed $badgeid ID of the badge
|
|
* @param mixed $studyplanid ID of the relevant study plan
|
|
* @return array
|
|
*/
|
|
public static function scan_badge_progress($badgeid, $studyplanid) {
|
|
global $DB;
|
|
// Check access to the study plan.
|
|
$o = studyplan::find_by_id($studyplanid);
|
|
webservicehelper::require_capabilities(self::CAP_VIEW, $o->context());
|
|
|
|
// Validate that badge is linked to studyplan.
|
|
if (!$o->badge_linked($badgeid)) {
|
|
throw new \webservice_access_exception("Badge {$badgeid} is not linked to studyplan {$o->id()}");
|
|
}
|
|
|
|
// Get badge info.
|
|
$badge = new \core_badges\badge($badgeid);
|
|
$badgeinfo = new badgeinfo($badge);
|
|
|
|
// Get the connected users.
|
|
$students = associationservice::all_associated($studyplanid);
|
|
// Just get the user ids.
|
|
$studentids = array_map(function ($a) {
|
|
return $a["id"];
|
|
}, $students);
|
|
|
|
return [
|
|
"total" => count($studentids),
|
|
"issued" => $badgeinfo->count_issued($studentids),
|
|
];
|
|
}
|
|
}
|